…(even if patient shows no overt signs of pain since many non-domestic species become docile when painful), provide analgesia. No wildlife (unless hand-raised) is “tame” or “grateful for being rescued” - these signs may be interpreted as neurological trauma, fear, debility, extremes of age, or possibly normal predator avoidance behavior.
— Annabelle Olsson, PhD, BVSc, MSc, MANZCVS, (via moreanimalia)